fix: FF auto-import always runs if CSV present, deletes CSV after success

- Remove count>0 guard — import runs regardless of existing rows (idempotent upsert)
- After successful import, CSV is deleted from /app so next restart skips cleanly
- No more need to manually trigger import or remove CSV from git separately

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/main.py

@@ -95,30 +95,27 @@ def startup():
     from services.institutional_scheduler import start_institutional_scheduler
     start_institutional_scheduler()
 
-    # Auto-import Forex Factory CSV if ff_calendar table is empty
+    # Auto-import Forex Factory CSV if file is present (force, then delete CSV)
     import threading
     def _auto_import_ff():
-        import time, os
+        import os
-        from services.database import get_conn
         from routers.eco import _find_csv, _run_ff_import, _ff_import_status
+        csv_path = _find_csv()
+        if not csv_path:
+            print("[Startup] forex_factory_cache.csv not found — skipping FF auto-import", flush=True)
+            return
+        print(f"[Startup] FF CSV found at {csv_path} — importing (force) …", flush=True)
+        _run_ff_import(csv_path)
+        result = _ff_import_status.get("last_result") or {}
+        inserted = result.get("inserted", 0)
+        total   = result.get("total", 0)
+        print(f"[Startup] FF import done — {inserted} inserted / {total} total", flush=True)
+        # Delete CSV after successful import so next restart skips automatically
         try:
-            conn = get_conn()
+            os.remove(csv_path)
-            count = conn.execute("SELECT COUNT(*) FROM ff_calendar").fetchone()[0]
+            print(f"[Startup] CSV deleted: {csv_path}", flush=True)
-            conn.close()
-            if count > 0:
-                print(f"[Startup] ff_calendar already has {count} rows — skipping auto-import", flush=True)
-                return
-            csv_path = _find_csv()
-            if not csv_path:
-                print("[Startup] forex_factory_cache.csv not found — skipping auto-import", flush=True)
-                return
-            print(f"[Startup] ff_calendar empty — auto-importing {csv_path} …", flush=True)
-            _run_ff_import(csv_path)
-            result = _ff_import_status.get("last_result") or {}
-            inserted = result.get("inserted", 0)
-            print(f"[Startup] FF auto-import done — {inserted} rows inserted", flush=True)
         except Exception as e:
-            print(f"[Startup] FF auto-import error: {e}", flush=True)
+            print(f"[Startup] Could not delete CSV: {e}", flush=True)
 
     threading.Thread(target=_auto_import_ff, daemon=True).start()